In defnce of the OP, it is true that prices go up for certain items covered by Canons MSRP policy as related to Rebates.
It is not the fault of Canon Rumors, and some prices also go down.
I've written to the New York State Attorney General's office to complain about deceptive pricing, but its fallen on deaf ears, and now with Canon's new MAP policy, the rebates tend to be real for most of the camera stores in the country. The smaller ones, in particular, benefit greatly from the rebate deals.